Urm.... I don't really agree with the OP but I just want to ask...
How?
Can't run away from those oh slow moving monsters fast enough?
Yes, that's one reason to use animal form. But mainly because the nerf suggested is to increase the skills required for running forms across the board. Non pvp'rs use nintjisu and animal form as well, one reason is to run away from the faster moving monsters (paragons/miasma/rend, speedhacking roaches in doom etc), away from spell casting monsters/dragon breath. And this is normal lag situations. If you ping 300, the effect is even more pronounced.
A blanket change to increase the minimum skill required will hurt everyone, includer PvM'rs.
Now, unless the suggestion only affects PVP'rs, then it won't hurt the PvM'rs.
So, to consider the opposite, is there a way to stengthen other templates? The main issue that's highlighted is the GD has a chance to combo Explo/FS/Firebreath which will result in instant death.
If we go with a boosting other templates method, we can look at boosting the HPs for players. Again, simply boosting HP will unbalancing PvP mages, so a proper look into this is required, like boosting the mana pool. I have considered the 1 control slot solution, and I do not dispute that it's an elegant solution to this issue. It doesn't hurt PvM'rs as much, but it still impacts them. I can use that 1 control slot to summon nature's fury or pixie/imp to draw rend's attention away from me, or even to join my 2 other EVs that are already engaging Miasma.
It would be a different story if the suggestion would only target just the PvP aspects. On one hand, I think using pets/summons is more a PK/gank tactic than PvP. It's not just the GD. I mean, let's say somehow the GD is made non viable for PvP. What's to stop the same tamer using 5 frenzied ossies/prepatch imps? Even if animal form takes 1 slot, it's still 4 ozzies with pack instinct.
On the other hand, I also think Fel tamers should be able to defend themselves.
So if we look at the issue from this angle, maybe viable solutions would be to cap the damage that pets does to other players, or even make pets refuse to attack other players when commanded. They only attack if the tamer is being guarded. Now, again, it's not so simple, this will impact many other things that needs to be properly looked at. And it's a nerf too, which I don't like. I am saying it just to offer another angle to look at the problem.